Final answer:
The statement 'Any rock can turn into another rock or itself' is true according to the rock cycle. This geological concept explains how igneous, sedimentary, and metamorphic rocks can transform into one another through various processes such as melting, erosion, compaction, heat, and pressure.
Step-by-step explanation:
The rock cycle is a fundamental concept in geology that outlines the transitions among the three main types of rocks: igneous, sedimentary, and metamorphic. Each rock type can transform into any of the others through various geological processes driven by the movement of tectonic plates. To address the specific question, statement 1 is true: 'Any rock can turn into another rock or itself'.
For instance, high temperature and pressure can alter both igneous and sedimentary rocks to form metamorphic rocks. Conversely, these metamorphic rocks can be subjected to conditions that might melt them to form magma, and eventually cool down to become igneous rocks. Similarly, rocks can also be weathered and eroded into sediments that lithify into sedimentary rocks.
To further illustrate, igneous rocks form from the solidification of lava or magma. When these rocks are broken down through weathering and erosion, sediments are formed, which can eventually compact and cement into sedimentary rocks. If these sedimentary or other pre-existing rocks are then subjected to intense heat and pressure below the Earth's surface, they can change their structure and mineral composition, becoming metamorphic rocks.